Dirk & O2,
Thanks for that outline of fuel use per person for different modes of transportation. The defect of both that method and mine is the effort needed to estimate what’s being left out. What I think people need is a list of impacts something like the one you provided, but that is easyier, inclusive and comparable.
People just want a direct easy way to compare choices, not spend all their time trying to understand unexplained units of measure and wondering what is left out. For example, using the cost of shipping to calculate fuel use might leave out the subsidies for the transit system that go into it, yes, but that’s fairly easy to factor in. (more…)